[sPlOrYgOn]

they will choose the path with the least danger value.
so even if all the danger values are very high they will choose the path with the least danger value.
and each round the danger value for each waypoint is decreased. I dunno by how much tho..
if there is only one path then they have no choice and therefore danger value is almost useless since there is only 1 path.
just play around with the value until you find a good value that you think most humans are like.